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<p>This study employs finite element simulations to investigate the influence of distinct pre-textured surfaces (Line, Wave, Concave, and Convex) on the microcutting behavior of CrCoNi medium-entropy alloy. Cutting depth governs force magnitudes: doubling depth from 12 to 24&#xa0;μm led to X-direction force increases over 50% while Y-direction forces dropped more than 45% across all textures. Texture geometry critically modulates performance: at 12&#xa0;μm depth, the Convex texture generated X-direction force approximately 24% higher than the Line type, while Wave and Concave textures showed reductions of 12 and 17%, respectively. Elevated cutting speed significantly intensified thermal loads, increasing temperature over 75% as speed rose from 100 to 300&#xa0;mm/s, with Convex texture consistently exhibiting the highest temperatures. Residual stress distribution, while predominantly surface compressive, revealed strong texture-parameter coupling: performance rankings reversed under different conditions. For instance, at 24&#xa0;μm depth, the Wave texture generated peak compressive stress ~ 25% higher than Convex, contrasting the shallower depth trend. Crucially, the Convex-type induced residual stress over 60% higher than Line at 400&#xa0;mm/s speed. These quantitative insights demonstrate microtexture geometry as a decisive factor for tailoring cutting mechanics and stress states in CrCoNi alloys.</p>

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Study on the Microcutting Mechanism of Pre-textured CrCoNi Medium-Entropy Alloy

  • 期刊论文

  • 发表日期：

    2025年10月25日

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  • Ping Zhang,
  • Tengfei Zhang,
  • Songting Zhang,
  • Xuezhao Wang

摘要

This study employs finite element simulations to investigate the influence of distinct pre-textured surfaces (Line, Wave, Concave, and Convex) on the microcutting behavior of CrCoNi medium-entropy alloy. Cutting depth governs force magnitudes: doubling depth from 12 to 24 μm led to X-direction force increases over 50% while Y-direction forces dropped more than 45% across all textures. Texture geometry critically modulates performance: at 12 μm depth, the Convex texture generated X-direction force approximately 24% higher than the Line type, while Wave and Concave textures showed reductions of 12 and 17%, respectively. Elevated cutting speed significantly intensified thermal loads, increasing temperature over 75% as speed rose from 100 to 300 mm/s, with Convex texture consistently exhibiting the highest temperatures. Residual stress distribution, while predominantly surface compressive, revealed strong texture-parameter coupling: performance rankings reversed under different conditions. For instance, at 24 μm depth, the Wave texture generated peak compressive stress ~ 25% higher than Convex, contrasting the shallower depth trend. Crucially, the Convex-type induced residual stress over 60% higher than Line at 400 mm/s speed. These quantitative insights demonstrate microtexture geometry as a decisive factor for tailoring cutting mechanics and stress states in CrCoNi alloys.